(;AB[bq]AB[bp]AB[bo]AB[cp]AB[dp]AB[ep]AB[eq]AB[fr]AW[cm]AW[bn]AW[co]AW[do]AW[eo]AW[fo]AW[fq]AW[gq]AW[er]AW[dr]AW[dq]AW[cq]C[Black to find a way]AP[goproblems]
(;B[br];W[gr]
(;B[bs];W[ao];B[ap];W[ar])
(;B[cs];W[cr]
(;B[bs];W[ao];B[ap];W[ar])
(;B[ao];W[aq]
(;B[ar];W[bs])
(;B[bs];W[ar]))
(;B[ar];W[bs]))
(;B[cr];W[cs];B[bs];W[ao]))
(;B[cr]
(;W[br];B[bs]
(;W[cs];B[ar];W[as]C[koRIGHT])
(;W[ar];B[ds]C[better ko for black than in the correct solution]))
(;W[cs]
(;B[br])
(;B[bs];W[br];B[ar];W[as]C[koRIGHT])))
(;B[cs];W[cr]
(;B[es];W[br])
(;B[br];W[gr]
(;B[bs];W[ao];B[ap];W[ar])
(;B[ao];W[bs])))
(;B[bs];W[cr]))